Knowledge Base ISC Main Website Ask a Question/Contact ISC
Quick Jump Menu
Categories
There are no subcategories in this category.
1 Newly Pre-defined Options in DHCP 4.3

In 4.3.0 we have added a number of definitions for options for DHCPv4 and DHPCv6 that were previously defined by the IETF. In order to minimize conflicts with definitions that users may have created for these options we have adopted a new style for the definitions.…

2 DHCPv6 support for relay options in ISC DHCP 4.3

Question: How can I access relay agent options in my DHCPv6 configuration? Answer: Unlike DHCPv4, in DHCPv6 each relay agent along the packet path will add its own set of relay agent options, encapsulating the options of all prior relay agents, with the specification…

3 Adding support for "on commit", "on expire", and "on release" statements in DHCPv6

Question: How do I make use of the new on_commit, on_expiry, on_release statements for DHCPv6? Answer: These statements function in DHCPv6 pretty much the same as they do in DHCPv4, allowing you to specify actions to be taken when the matching event happens…

4 Support in ISC DHCP for DDNS (Dynamic DNS) without zone statements

ISC DHCP 4.3 returns support for using DDNS without a zone statement in the patch for [RT #30461]. In 4.1 and earlier versions of ISC DHCP if the server was attempting to update the DNS with a name for which it didn't have a zone statement it would attempt…

5 Caution is strongly recommended if using the "dont-use-fsync" option

Beginning with DHCP 4.3, ISC DHCP now supports an option to disable the use of fsync(). fsync() is a file-control primitive that instructs the operating system to synchronize pending writes to permanent storage (generally causing modified memory buffers that…

6 Adding class support for DHCPv6 in ISC DHCP 4.3

During the development of DHCP 4.3, a major priority was the extension of functionality existing in the DHCPv4 server to analogous features in DHCPv6. One of the most-requested features developed as part of this effort is the power to discriminate between…

7 OMAPI support for classes and subclasses

ISC DHCP 4.3 [ISC-Bugs 27452] enhances OMAPI support for adding and deleting classes and subclasses. This allows you to dynamically add or remove classes and subclasses rather than needing to modify your configuration file and then restart the server. The…

8 ISC DHCP support for Standard DDNS

ISC DHCP 4.3 updates the DDNS code to be compliant with RFCs 4701, 4702, 4703 and 4361 [RT #21139]. Dynamic DNS update styles Over the years there have been three distinct styles for the DDNS code. The ddns-update-style option in the configuration file is…